Improvement in pump-pistons



N- PETERS. PHOTO LITHOGRAPN ffice.,

@with gioire OLIVER SALGEE, OF NEW YORKQN, Yf

Letters .Pate-nt N 77,538, dated Ilfay 5, 1868; fmtedatefl April 25, 1868.

@In Stimuli ruimt tu in their -ettrts ntent animating mi nt tige time.

TO ALL WIIOM I'l MAY OONCERN:

Be it known thnlt I, OLIVER SALGEE, ofthe city und State of New York, have invented, made, and applied to use, n certain new and useful Improvement in Pump-Pistons;v and I do hereby declare the following to be e full, eienr, and exnct description of the said invention, reference heing'lhad to the annexedv drawing, making part of this specification, whereinl Figure 1 is n vertical section of n pump with one of the pistons formed in'the mnnner heretofore usual', and the other of my improved construction, and

Figure 2 is aseetionnl view :it right angles to iig. 1, showing my improved piston.

. Similar letters denote the sume parts.

Pumps have heretofore` been constructed. with two cylinders, ct I1, upon e vulve-box, having a. hood or cap, c, enclosing the upper ends of the cylinders, with un exit at d, foi-,thc water, n 'rock-shaft, e, passing through stuffing-boxes, and receiving,r outside the hood .cpumphrnke levers, hywhich the pump is operated, and within the hood, curved arms fore provided, with rollers entering horizonteilslots in tho slide and strapg of each piston. In this form there are considerable frictionnnd weer, hothroin-.th'e piston and on the cylinder, because the roller beurs first on one side, and then on theother, of the pis'tonstrop, and hence the pump very quickly wears leuky, und has to be repaired, besides requiring considerable power to overcome friction.

The nature ofmy seid invention consists in n forked link, combinati with o piston-ring and valve, said piston. ring being formed with sockets, for receiving,r the ends of seid forked link, so that the power exerted in moving the piston is applied to the same ut n point inside of und between its upper and lower surfaces, so that thereis little er no power lost in friction, :ind no tendency te bind the piston inthe eylinder,or to produce an unequal weer in either the cylinder or the piston, und the space for the water-wey and valve is not lessened.l

le is my forked link, jointed at z' to the lever-*arm f, und attheends ll to the ring m, forming the piston, seid ring being.)T made with sockets, for the reception of snidjoints ZI, and pins n, passing `through, on which the link e swings, to conform to the u-rc of n circle described by the joint z'.

The vulve o is applied to the upper fuce of the piston, und swings ns usual, und the packing, ya, is to he wound nround the piston, in the recess formed for it.

What I claim, and desire to secure hy Letters Potent, is

The forked link le, in combination with the ring-piston m, that is formed with sockets, receiving the joints of said link 7e, und with the vulve-0, u pplied between the forked link, ns and for the purposes set forth.

In witness whereof, I have hereunto set-my signature, this nineteenth dey of dune, A. D. 1867.

OLIVER SALGEE.

Witnesses:

Geenen D. WALKER, GEORGE T. PINCKNEY. 

